Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6b15b344226219…

MALICIOUS

PDF

54.9 KB Created: 2020-10-07 11:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3e5eaf6e798a974884cc60199467b23a SHA-1: 0d23899b91157e32187bd8689f652f1cd82a14a8 SHA-256: 1f6b15b344226219a4dfdcfa72256a076f369eb8cbdd826a838565cb60135e53
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=whirligig+plans+pdf+free In PDF document text
    • https://site-1038792.mozfiles.com/files/1038792/35701008902.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/xusosogikalomatibuguse.pdfIn PDF document text
    • https://site-1042988.mozfiles.com/files/1042988/jigolizekulaxe.pdfIn PDF document text
    • http://runakaz.elizabethjunebergman.com/uploads/1/3/2/3/132303245/249889b2b1253f1.pdfIn PDF document text
    • http://sidutomu.ajreisingerlab.com/uploads/1/3/0/9/130969335/7127549.pdfIn PDF document text
    • http://files.cmc-tam.org/uploads/1/3/1/3/131381376/1ac503a.pdfIn PDF document text
    • http://xerar.contrasyncretist.com/uploads/1/3/1/6/131606875/poxupuvatidozajog.pdfIn PDF document text
    • http://bapubom.artbymichellwithoutane.com/uploads/1/3/2/3/132302772/vitamexemaloba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f0a8c4-a2e5-4cfb-9646-c9ae99a9f50d/jitetozevezebaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7805b4bd-86d6-4aff-bce1-99187b492d18/bafibejekironimukeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4aa1af2-5186-4060-8f6f-11ea9e8234f5/26795683297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a909ff-02bd-451e-94f7-ddc26139f438/kosagawetoxomov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b3cb36-fed7-4634-9672-e1f290c76068/konunozamuwofufuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1467/1514/files/freaky_friday_musical_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0198/1339/files/8310225296.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8338 5316 bytes
SHA-256: 4cb71540d30fa7395a8d53086407fc64710c4485330356197539d40618bdae6a
font_01_sfnt_off0000954e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x954E 2212 bytes
SHA-256: da6d78aabf2e0c131008e37c11e4029f2c1c73ee37dba6522cd96161b08373bb
font_02_sfnt_off00009f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F67 15076 bytes
SHA-256: 3e3e6e4b5a0b8b8915a8fc6e1400b0e46dce06efd00eb817d27d28e0e7695df4

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